For Arduino Professional 3D printer CNC Kit,Longruner GRBL CNC Shield +UNO R3 Board+RAMPS 1.4 Mechan

CNC Shield Board:
Latest CNC Shield Version 3.0 for arduino.
GRBL 0.9 compatible.
4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13).
2 x End stops for each axis (6 in total).
Coolant enable.
Compatible with A4988 or DRV8825 stepper driver.
Runs on 12-36V DC.

DRV8825 Stepper Motor Driver:
Stepper motor driver (upgraded from A4988, 2.5 A max current/phase. It's not arduino official board but it's compatible with all arduino software and hardware).

Nema 17 Stepper motor Specification:
Model No.:17HD48002H-22B
Step Angle: 1.8 deg
Holding Torque: 59Ncm(84 oz.in)
Rated Current/phase: 1.7A
Frame Size: 41 x 41mm
Body Length: 47mm
Shaft Diameter: 5mm
Shaft Length: 22mm
Weight: 380g

Mechanical Endstop Connection Description:
Red line connect VCC (ramps of +)
black wire connect the GND (ramps of -)
Green Line connect SIGNAL (ramps in s)
Tips: Under normal circumstances, the system must be configured to at least three mechanical switches.
Advantage: Easy to install, the more common used styles.
Length of Cable: 70 cm

Great Package Includes:
1 x CNC Shield Board
1 x Longruner UNO R3 Board
1 x 1.5m USB cable for R3 Board
3 x Nema 17 stepper motor 1.7 A (with bracket and screw)
3 x Nema 17 Stepper Motor Mounting Bracket
3 x Mechanical Switch Endstop
3 x 3Pin 70cm Cable
4 x DRV8825 Stepper Motor Driver
4 x Aluminum heatsink w/ 3M tape backing
12x M3 Screws for bracket of stepper motor